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[case mx270]

We ve bought a Makita 9010 people talk about a exhaust mods different sprockets and bars etc so why would you this ? what can you do ? and where do get parts ? Thanks

[Stubby]

We ve bought a Makita 9010 people talk about a exhaust mods different sprockets and bars etc so why would you this ? what can you do ? and where do get parts ? Thanks

 

Look at spuds porting thread . All on there ........

[case mx270]

Look at spuds porting thread . All on there ........

 

Thanks how about the differences in bars and sprocket though

[Stubby]

Thanks how about the differences in bars and sprocket though

 

Bars . Long, short, in between . Basically if you put a bar that is too long for the size of the engine it will struggle . If you put a bar on that is way short of what the engine can handle you can take advantage of this and put a slightly bigger sprocket on which will raise the gearing giving you a faster chain speed . . A good rule of thumb is max bar length in inches = to one third of engine capacity . I.E. 60cc engine max 20" bar

[case mx270]

Bars . Long, short, in between . Basically if you put a bar that is too long for the size of the engine it will struggle . If you put a bar on that is way short of what the engine can handle you can take advantage of this and put a slightly bigger sprocket on which will raise the gearing giving you a faster chain speed . . A good rule of thumb is max bar length in inches = to one third of engine capacity . I.E. 60cc engine max 20" bar

 

Thanks and why are some bars less power sapping than others of the same length

[spudulike]

Thanks and why are some bars less power sapping than others of the same length

 

Thats all about kerf - thats how wide a chunk that bars take out of the wood - a narrow kerf bar and chain takes a narrower channel out so takes less power - it is however less forgiving on heavy logging and felling work.

 

You can also get in to half skip and full skip chain where instead of having a full compliment of cutters on your chain, every other one or one in three is missing causing less drag and sapping less power - one way to get a lesser saw to pull a big bar. Not so common in the UK though!

[case mx270]

Thats all about kerf - thats how wide a chunk that bars take out of the wood - a narrow kerf bar and chain takes a narrower channel out so takes less power - it is however less forgiving on heavy logging and felling work.

 

You can also get in to half skip and full skip chain where instead of having a full compliment of cutters on your chain, every other one or one in three is missing causing less drag and sapping less power - one way to get a lesser saw to pull a big bar. Not so common in the UK though!

 

Thanks

[MattyF]

Sprocket or solid nose bars?? One has a sprocket and in turn does not sap as much power as a solid nose, very rare to come across solid nose bars these days though unless on very big bars on carving bars.

[miker]

my dolmar 9000 (makita 9010) had solid nose bar, put a sprock nose on and it transformed the saw, 30 inch, pulled it well

[Jonathan O'Leary]

What are the advantages of a solid nose bar? My 880 has got a 48 inch solid nose bar and thinking of replacing it with a roller nose, if I can find one.